Tag «fossil»

Fossil Fuels: The Greenest Energy

Fossil Fuels: The Greenest Energy

What if I told you that someone had developed an energy source that could help us solve our biggest environmental challenges, purify our water and air, make our cities and homes more sanitary, and keep us safe from potential catastrophic climate change? What if I also told you that this energy source was cheap, plentiful, …

Earth’s mass extinctions | Peter Ward

Earth’s mass extinctions | Peter Ward

So, I want to start out with this beautiful picture from my childhood. I love the science fiction movies. Here it is: “This Island Earth.” And leave it to Hollywood to get it just right. Two-and-a-half years in the making. (Laughter) I mean, even the creationists give us 6,000, but Hollywood goes to the chase. …

Evolution: It’s a Thing – Crash Course Biology #20

Evolution: It’s a Thing – Crash Course Biology #20

Congratulations! This is our last episode of our section on Evolution and Genetics, which puts us at the halfway mark of CrashCourse Biology. So far we’ve learned about DNA, genetics, natural selection, how cells multiply, populations, speciation, replication, respiration, and photosynthesitation. I’m so proud of you. But I couldn’t let this section end without discussing …